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31d470ac JM |
1 | /* Test backtrace and backtrace_symbols for signal frames. |
2 | Copyright (C) 2011-2013 Free Software Foundation, Inc. | |
3 | This file is part of the GNU C Library. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
17 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <execinfo.h> | |
20 | #include <search.h> | |
21 | #include <stdio.h> | |
22 | #include <stdlib.h> | |
23 | #include <string.h> | |
24 | #include <sys/types.h> | |
25 | #include <signal.h> | |
26 | #include <unistd.h> | |
27 | ||
8c53a12c JM |
28 | #include "tst-backtrace.h" |
29 | ||
31d470ac JM |
30 | static int do_test (void); |
31 | #define TEST_FUNCTION do_test () | |
32 | #include "../test-skeleton.c" | |
33 | ||
31d470ac JM |
34 | /* The backtrace should include at least handle_signal, a signal |
35 | trampoline, 3 * fn, and do_test. */ | |
36 | #define NUM_FUNCTIONS 6 | |
37 | ||
31d470ac JM |
38 | volatile int sig_handled = 0; |
39 | ||
40 | void | |
41 | handle_signal (int signum) | |
42 | { | |
43 | void *addresses[NUM_FUNCTIONS]; | |
44 | char **symbols; | |
45 | int n; | |
46 | int i; | |
47 | ||
48 | sig_handled = 1; | |
49 | ||
50 | /* Get the backtrace addresses. */ | |
51 | n = backtrace (addresses, sizeof (addresses) / sizeof (addresses[0])); | |
52 | printf ("Obtained backtrace with %d functions\n", n); | |
53 | /* Check that there are at least six functions. */ | |
54 | if (n < NUM_FUNCTIONS) | |
55 | { | |
56 | FAIL (); | |
57 | return; | |
58 | } | |
59 | /* Convert them to symbols. */ | |
60 | symbols = backtrace_symbols (addresses, n); | |
61 | /* Check that symbols were obtained. */ | |
62 | if (symbols == NULL) | |
63 | { | |
64 | FAIL (); | |
65 | return; | |
66 | } | |
67 | for (i = 0; i < n; ++i) | |
68 | printf ("Function %d: %s\n", i, symbols[i]); | |
69 | /* Check that the function names obtained are accurate. */ | |
8c53a12c | 70 | if (!match (symbols[0], "handle_signal")) |
31d470ac JM |
71 | { |
72 | FAIL (); | |
73 | return; | |
74 | } | |
75 | /* Do not check name for signal trampoline. */ | |
76 | for (i = 2; i < n - 1; i++) | |
8c53a12c | 77 | if (!match (symbols[i], "fn")) |
31d470ac JM |
78 | { |
79 | FAIL (); | |
80 | return; | |
81 | } | |
82 | /* Symbol names are not available for static functions, so we do not | |
83 | check do_test. */ | |
84 | } | |
85 | ||
86 | NO_INLINE int | |
87 | fn (int c) | |
88 | { | |
89 | pid_t parent_pid, child_pid; | |
90 | ||
91 | if (c > 0) | |
92 | { | |
93 | fn (c - 1); | |
94 | return x; | |
95 | } | |
96 | ||
97 | signal (SIGUSR1, handle_signal); | |
98 | parent_pid = getpid (); | |
99 | ||
100 | child_pid = fork (); | |
101 | if (child_pid == (pid_t) -1) | |
102 | abort (); | |
103 | else if (child_pid == 0) | |
104 | { | |
105 | sleep (1); | |
106 | kill (parent_pid, SIGUSR1); | |
107 | _exit (0); | |
108 | } | |
109 | ||
110 | /* In the parent. */ | |
111 | while (sig_handled == 0) | |
112 | ; | |
113 | ||
114 | return 0; | |
115 | } | |
116 | ||
117 | NO_INLINE static int | |
118 | do_test (void) | |
119 | { | |
120 | fn (2); | |
121 | return ret; | |
122 | } |